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Re: Ground current

Another reason not to connect Neutral and earth ground- Power companies use
the neutral end to send intercompany communications around. Grouunding it
effectively kills their signals by somewhere around 10 dB and they will come
looking for you.

-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Friday, October 02, 1998 8:12 PM
Subject: RE: Ground current


>Original Poster: Sulaiman Abdullah <sulaiman-at-lityan-dot-com.my>
>
>Greetings,
>As far as I know the electricity supply companies connect line neutral
>to earth at their end of the consumer supply, thereafter the neutral and
>earth wires
>should NEVER be connected together as there is always an imbalance in
>the three phases which causes the neutral at your end to be several
>volts
>away from ground. Anyone can measure this at home with a simple a.c.
>voltmeter. Sometimes I connect a low-voltage filament bulb (torch bulb)
>from neutral to earth and watch the fluctuations - occasionally the
>imbalance
>is so high that the bulb will blow!
>So, at our end we should NEVER connect neutral and earth unless it's
>after an isolating transformer.
>
>> ----------
>> From: Tesla List[SMTP:tesla-at-pupman-dot-com]
>> Sent: Friday, October 02, 1998 7:56 AM
>> To: tesla-at-pupman-dot-com
>> Subject: Ground current
>>
>> Original Poster: "Paul Marshall" <klugmann-at-hotmail-dot-com>
>>
>> I have a question about ground current. I have 25 KVA pig, line
>> neutral
>> is connected to the case and the case is connected to ground. Last
>> night
>> I pulled out my handy meter and checked for current to ground. I found
>>
>> that I had a 3 amp current in the ground lead. I turned off the power
>> to
>> the pig and checked again, 3 amps ! I turned off the power at the
>> mains
>> still 3 amps. Next I checked to see what the voltage was. It wasn't
>> measurable < 1 volt. Can anyone tell me what is going on ? Also there
>> is
>> no sign of a spark between the ground lead and the ground terminal.
>>
>> paul m
>>
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